Transformer modeling in Simulink - Mini Project: Build & Apply

Transformer modeling

📖 Scenario: You are working on an electrical engineering project where you need to model a simple transformer using Simulink. Transformers are devices that transfer electrical energy between circuits through electromagnetic induction. Modeling a transformer helps understand voltage and current changes between primary and secondary coils.

🎯 Goal: Build a basic transformer model in Simulink with primary and secondary coils, set the turns ratio, and observe the output voltage.

📋 What You'll Learn

Create a Simulink model with two inductors representing primary and secondary coils

Set the turns ratio between primary and secondary coils

Connect the coils with a mutual inductance block

Simulate the model and observe the output voltage

💡 Why This Matters

🌍 Real World

Transformers are essential in electrical power systems to change voltage levels for safe and efficient power transmission.

💼 Career

Electrical engineers use transformer modeling to design and analyze power systems, ensuring devices operate safely and efficiently.

1

Create primary and secondary inductors

In Simulink, create two inductors named PrimaryCoil and SecondaryCoil with inductance values 0.5 H and 0.05 H respectively.

Simulink

% Create two inductors named PrimaryCoil and SecondaryCoil with inductance 0.5 and 0.05
% Your code here

Hint

Use the inductance() function or equivalent block to create inductors with specified values.

2

Set turns ratio variable

Create a variable called turnsRatio and set it to 10 to represent the ratio of turns between primary and secondary coils.

Simulink

% Create two inductors named PrimaryCoil and SecondaryCoil with inductance 0.5 and 0.05
PrimaryCoil = inductance(0.5);
SecondaryCoil = inductance(0.05);
% Define turnsRatio variable
% Your code here

Hint

Simply assign the number 10 to the variable turnsRatio.

3

Connect coils with mutual inductance

Use the mutualInductance function or block to connect PrimaryCoil and SecondaryCoil with a coupling coefficient of 0.99. Store the result in a variable called Transformer.

Simulink

% Create two inductors named PrimaryCoil and SecondaryCoil with inductance 0.5 and 0.05
PrimaryCoil = inductance(0.5);
SecondaryCoil = inductance(0.05);
turnsRatio = 10;
% Connect coils with mutual inductance
% Your code here

Hint

Use the mutualInductance() function with the two coils and coupling coefficient 0.99.

4

Simulate and display output voltage

Simulate the transformer model and print the output voltage variable called outputVoltage.

Simulink

% Create two inductors named PrimaryCoil and SecondaryCoil with inductance 0.5 and 0.05
PrimaryCoil = inductance(0.5);
SecondaryCoil = inductance(0.05);
turnsRatio = 10;
Transformer = mutualInductance(PrimaryCoil, SecondaryCoil, 0.99);
% Simulate and print output voltage
% Your code here

Hint

Assuming input voltage is 230 V, multiply by turnsRatio to get outputVoltage and print it.